People party only when feeling their best or feeling their worst. When there is a victory or other particular joyous occasion, people will turn to one another and say, “Let’s go out and party!” But when life brings bad tidings often people convince themselves that the best solution is to go out and find something to feel good about, or at least find something that will help them forget. In fact, oftentimes you will find both types of people at the same party.
With the exception of sometimes going to parties out of a sense of boredom, of which most people are surely guilty, there is little deviation from this. No-one ever says “I feel okay. I think I’ll go to a party,” unless bored or pulled on the arm by someone else.